Update docs and github workflows

Author: Bill-hbrhbr

.github/workflows/unit-tests.yaml

@@ -62,4 +62,4 @@ jobs:
           command -v task
 
       - name: "Run unit tests"
-      - run: "task test:all"
+      - run: "task test"

README.md

@@ -28,15 +28,30 @@ git submodule update --init --recursive
 ```
 
 ## Building
-To build all targets in `ystdlib-cpp`:
+To build all targets:
 ```shell
 task build:all
 ```
 
+To build the global unit test target:
+```shell
+task build:unit-test
+```
+
+To build unit tests for a specific library:
+```shell
+task build:unit-test -- <lib_name>
+```
+
 ## Testing
-To run all unit tests in `ystdlib-cpp`:
+To build and run all unit tests:
+```shell
+task test
+```
+
+To build and run unit tests for a specific library:
 ```shell
-task test:all
+task test -- <lib_name>
 ```
 
 ## Linting